Addition/Correction pubs.acs.org/est
Correction to The Role of Irrigation Techniques in Arsenic Bioaccumulation in Rice (Oryza sativa L.) Antonino Spanu, Leonardo Daga, Anna Maria Orlandoni, and Gavino Sanna* Environ. Sci. Technol. 2012, 46, 8333−8340; DOI: 10.1021/es300636d
P
age 8335, Table 2, ninth column from the left. Unfortunately the HorRatR reproducibility values are incorrectly reported as 48.9 and 64.4. The correct values are 0.16 and 0.25, respectively. Table 2. Validation Parameters for the ICP-MS Determination of Total As in Rice repeatabilityb
linearity a
LoD (μg kg−1) 0.32
LoQ (μg kg−1) 1.06
concentration range (μg kg−1): 1−1500 Y = (a ± sa)X + (b ± sb) a = 1.0002 sa = 0.0054 b = 0.0175 sb = 0.0083 R2 = 0.9996
rice genotype CV%exp,r
d
reproducibilityc HorRatr
SAPISE 164 ARSENAL
1.28 2.63
0.04 0.07
ARPA
2.89
0.08
e
sample
accuracy
CV%exp,Rf HorRat,Rg
NIST 1568a 3.16 IRMM 804 5.68
0.16 0.25
CRM NIST 1568a NCS ZC 73008
recovery (% ± sh) 87 ± 10 84 ± 10
IRMM 804
84 ± 9
a Following Currie (1999).47 bevaluated by analyzing 3 samples of rice 10 times within the same analytical session. cevaluated by analyzing 3 CRM rice flours 17 times at different concentrations of total As. dCV%exp,r is the experimental coefficient of the variation of repeatability. eHorRatr is the ratio between CV%exp,r and the theoretical repeatability data (CV%H,r) according to Horwitz’s theory.48 fCV%exp,R is the experimental coefficient of the variation of reproducibility. gHorRatR is the ratio between CV%exp,R and the theoretical reproducibility data (CV%H,R) according to Horwitz’s theory.48 hSstandard deviation.
Page 8336, Table 3, second column, fourth and fifth line. The redox potential values have to be exchanged among them. The correct values are 130 ± 30 mV for sprinkler soils, and −200 ± 20 mV for flooding soils. Table 3. Extractable As (EAs) Concentration and the Redox Potential in Soils as a Function of the Sampling Depth and Irrigation Technique 0−20
20−40
EAs (μg kg−1 ± sa) in sprinkler soils
soil depth (cm)
3190 ± 20
2700 ± 10
EAs (μg kg−1 ± sa) in flooding soils
4680 ± 45
5470 ± 80
Redox potential (mV ± sa) in sprinkler soils
130 ± 30
Redox potential (mV ± sa) in flooding soils
−200 ± 20
a
Standard deviation.
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AUTHOR INFORMATION
Corresponding Author
*Phone: +39-079-229500; fax: +39-079-229559; e-mail: sanna@ uniss.it.
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NOTE ADDED AFTER ASAP PUBLICATION Changes to Table 3 were added to this Addition & Correction in the version published September 18, 2012. The correct version published October 2, 2012.
Published: September 18, 2012 © 2012 American Chemical Society
10858
dx.doi.org/10.1021/es3036219 | Environ. Sci. Technol. 2012, 46, 10858−10858
